The celeb-powered Summit on the Summit climb—which also included Isabel Lucas, Lupe Fiasco, Robert Kennedy's granddaughter, Kick, and Jacques Cousteau's granddaughter, Alexandra—reached its goal today at the top of Mt. Kilimanjaro, the highest point in Africa.
The six-day trek up the 19,341-foot peak was organized by Grammy-nominated musician Kenna to raise money on behalf of water-conservation issues.
"The last 48 hours have been the most intense and physically grueling experience of my life, miraculously we all made it to the top together," Hirsch, best known for his outdoorsy role in Into the Wild, texted upon summiting.
The climbers battled a variety of obstacles, including altitude sickness, nausea, stomach ailments, knee problems and yesterday's intense snowstorm at 16,000 feet, which fellow climber and United Nations Foundation exec Elizabeth Gore called "pretty gnarly."
Good luck getting down, guys.